Shock, broken leg, won't eat. Help please!

Hi. We had some chickens wondering our neighborhood and all was fine until some one moved in with awful leashless dogs. We scrambled to get a coop built and were able to save 2. Long story short a raccoon(we think) attacked the coop. The rooster didn't make it. And now I feel like the hen is traumatized. She can hop around but stays in coop. I've been able to get her to drink water from a medicine syringe. She ate a small amount of pellets watered down yesterday. But it's been 4 days total and I'm at a loss!